What to Use to Test 7-Way Trailer Connector

Question

Question:

Do you have a 7 pin round trailer light testor

asked by: Bob

0

Expert Reply:

To test a 7-way trailer connector on the rear of your vehicle you can use the Pollak Tester # PK12741. This tester is designed to work with all 7-way connectors. Another option is to use a circuit tester like # PTW2993 and go come pin to pin testing each individually.

If you're trying to test the trailer side connector it's a little different. A disconnected trailer doesn't have a power source so you will need something to provide it. The Hopkins Tow Doctor # HM50928 and Tekonsha Circuit Tester # 8010 will both test your trailer's wiring without it being connected to your tow vehicle.

expert reply by: Charles S

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Answer 1

To check the pins on the vehicle side 7-Way, you can use a circuit tester or the volt meter. The circuit tester will show you if a signal is coming through on the pin you are testing while the volt meter will tell you that and how much voltage is…

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Answer 2

While the Pollak 7-Way to RV Socket LED Circuit Tester #PK12741 is designed to work with all 7-way connectors. There have been issues with vehicles such as Audi, Mercedes-Benz, and Volkswagen that have issues due to the LED lights having such a low…

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Answer 3

The factory integrated brake controller in your 2013 Ford F-150 does have a second operation setting for EOH trailer brakes, unlike the 2012 and earlier model year controllers. So, it SHOULD work with your Titan BrakeRite EHB Electric-Hydraulic…

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Answer 4

The only difference between 7-Way Utility and 7-Way RV is the color of the wires. The pin outs are the exact same so either would work just fine with the other. If you check out the picture I attached you'll see that the functions are all the…

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Answer 5

It is possible that there is a part number somewhere that would help identify the landing gear on your trailer. Sometimes there is information on the underside of the caps on the tops of the jacks so that is another place you can check if you…

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Answer 6

Here is the wiring color codes for the 7-way part #HM20041 that you referenced: White: ground wire Yellow: left turn/brake light Green: right turn/brake light Brown: tail lights Purple: reverse lights Blue: electric brakes Black: auxiliary power This…

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Answer 7

I have attached a diagram for you to check out. This is taken from a helpful article on our site about wiring that I have linked for you as well. The Blue wire on the diagram is what you want to pay special attention to. If you can route it through a…

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Answer 8

Just to make sure I am understanding correctly, you are getting the correct signals on the black, blue, red, and white wires on the Tuson DirecLink, like the Base Model #335DL-100, but when you connect your trailer to your 2009 Freightliner it…

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Answer 9

There are a number of reasons why the brakes on your trailer may not be working. Lets start with the easiest things to check. First, check the vehicle and trailer connectors for corrosion. This can cause a short inside the connector and the brake…

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Answer 10

Thank you for all of the information! It sounds like you have the Plug-In Wiring Adapter #3015-P that's connecting the Prodigy P3 #90195 to the factory tow package port on your 2005 Chevy Silverado. From what I'm seeing it looks like that…

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Answer 11

To determine why you do not have any power on the blue brake output wire, I recommend starting at your brake controller. First, make sure the brake controller is on and receiving power. Most brake controllers have 4 wires, blue (brake output to…

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Answer 12

The Pollak 7-Way to RV Socket LED Circuit Tester #PK12741 will trick your 2022 GMC Sierra 3500 into thinking a trailer is connected as it uses the electrical connection to detect a trailer.

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